Prior to the release of MacOS Catalina, Logitech had a message saying they'd update MyHarmony to 64-bit. That message has now been replaced with the page below. Is it safe to say
MyHarmony Desktop - Download
Harmony Touch™ User Guide
Harmony® 5.0.1 APK Download by Logitech Europe S.A. - APKMirror
MyHarmony Desktop Software - Download & Review
How to Install the Logitech Harmony App - Support.com TechSolutions